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A new liquid-phase microextraction method based on solidification of floating organic drop

Zanjani, Mohammad Reza Khalili; Yamini, Yadollah LU ; Shariati, Shahab and Jönsson, Jan Åke LU (2007) In Analytica Chimica Acta 585. p.286-293
Abstract
In the present study, a new and versatile liquid-phase microextraction method is described. This method requires very simple and cheap apparatus and also a small amount of organic solvent. Eight microliters of 1-undecanol was delivered to the surface of solution containing analytes and solution was stirred for a desired time. Then sample vial was cooled by inserting it into an ice bath for 5 min. The solidified 1-undecanol was transferred

into a suitable vial and immediately melted; then, 2 uL of it was injected into a gas chromatograph for analysis.

Some polycyclic aromatic hydrocarbons (PAHs) were used as model compounds for developing and evaluating of the method performance.

Analysis was carried out by gas... (More)
In the present study, a new and versatile liquid-phase microextraction method is described. This method requires very simple and cheap apparatus and also a small amount of organic solvent. Eight microliters of 1-undecanol was delivered to the surface of solution containing analytes and solution was stirred for a desired time. Then sample vial was cooled by inserting it into an ice bath for 5 min. The solidified 1-undecanol was transferred

into a suitable vial and immediately melted; then, 2 uL of it was injected into a gas chromatograph for analysis.

Some polycyclic aromatic hydrocarbons (PAHs) were used as model compounds for developing and evaluating of the method performance.

Analysis was carried out by gas chromatography/flame ionization detection (GC/FID).

Several factors influencing the microextraction efficiency, such as the nature and volume of organic solvent, the temperature and volume of

sample solution, stirring rate and extraction time were investigated and optimized. The applicability of the techniquewas evaluated by determination

of trace amounts of PAHs in environmental samples. Under the optimized conditions, the detection limits (LOD) of the method were in the range

of 0.07–1.67 ugL−1 and relative standard deviations (R.S.D.) for 10 ugL−1 PAHs were <7%. A good linearity (r2 > 0.995) in a calibration range

of 0.25–300.00 ugL−1 was obtained. After 30 min extraction duration, enrichment factors were in the range of 594–1940. Finally, the proposed

method was applied to the determination of trace amounts of PAHs in several real water samples, and satisfactory results were resulted. Since very

simple devices were used, this new technique is affordable, efficient, and convenient for extraction and determination of low concentrations of

PAHs in water samples. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Gas chromatography-flame ionization detection, Liquid-phase microextraction, Water analysis, Polycyclic aromatic hydrocarbons
in
Analytica Chimica Acta
volume
585
pages
286 - 293
publisher
Elsevier
external identifiers
  • wos:000244328100012
  • scopus:33846629120
ISSN
1873-4324
DOI
10.1016/j.aca.2006.12.049
language
English
LU publication?
yes
id
2ffbde9c-919b-49b0-b4d7-6a0c43aefad8 (old id 765949)
date added to LUP
2008-01-03 10:45:19
date last changed
2017-11-19 04:11:24
@article{2ffbde9c-919b-49b0-b4d7-6a0c43aefad8,
  abstract     = {In the present study, a new and versatile liquid-phase microextraction method is described. This method requires very simple and cheap apparatus and also a small amount of organic solvent. Eight microliters of 1-undecanol was delivered to the surface of solution containing analytes and solution was stirred for a desired time. Then sample vial was cooled by inserting it into an ice bath for 5 min. The solidified 1-undecanol was transferred<br/><br>
into a suitable vial and immediately melted; then, 2 uL of it was injected into a gas chromatograph for analysis.<br/><br>
Some polycyclic aromatic hydrocarbons (PAHs) were used as model compounds for developing and evaluating of the method performance.<br/><br>
Analysis was carried out by gas chromatography/flame ionization detection (GC/FID).<br/><br>
Several factors influencing the microextraction efficiency, such as the nature and volume of organic solvent, the temperature and volume of<br/><br>
sample solution, stirring rate and extraction time were investigated and optimized. The applicability of the techniquewas evaluated by determination<br/><br>
of trace amounts of PAHs in environmental samples. Under the optimized conditions, the detection limits (LOD) of the method were in the range<br/><br>
of 0.07–1.67 ugL−1 and relative standard deviations (R.S.D.) for 10 ugL−1 PAHs were &lt;7%. A good linearity (r2 &gt; 0.995) in a calibration range<br/><br>
of 0.25–300.00 ugL−1 was obtained. After 30 min extraction duration, enrichment factors were in the range of 594–1940. Finally, the proposed<br/><br>
method was applied to the determination of trace amounts of PAHs in several real water samples, and satisfactory results were resulted. Since very<br/><br>
simple devices were used, this new technique is affordable, efficient, and convenient for extraction and determination of low concentrations of<br/><br>
PAHs in water samples.},
  author       = {Zanjani, Mohammad Reza Khalili and Yamini, Yadollah and Shariati, Shahab and Jönsson, Jan Åke},
  issn         = {1873-4324},
  keyword      = {Gas chromatography-flame ionization detection,Liquid-phase microextraction,Water analysis,Polycyclic aromatic hydrocarbons},
  language     = {eng},
  pages        = {286--293},
  publisher    = {Elsevier},
  series       = {Analytica Chimica Acta},
  title        = {A new liquid-phase microextraction method based on solidification of floating organic drop},
  url          = {http://dx.doi.org/10.1016/j.aca.2006.12.049},
  volume       = {585},
  year         = {2007},
}